Report ID
1996-05
Report Authors
R. Dolin, D. Agrawal, L. Dillon, and A. El Abbadi
Report Date
Abstract
This paper presents the design of Pharos: a scalable distributed architecturefor locating heterogeneous information sources. The system incorporates ahierarchical metadata structure into a multi-level retrieval system. Queriesare resolved through an iterative decision-making process. The first stepretrieves coarse-grain metadata, about all sources, stored on local, massivelyreplicated, high-level servers. Further steps retrieve more detailed metadata,about a greatly reduced set of sources, stored on remote, sparsely replicated,topic-based mid-level servers. We describe the structure, distribution, andretrieval of the metadata in Pharos to enable users to locate desirableinformation sources over the Internet.
Document
1996-05.ps865.41 KB